Machine for cutting sheet metal.



A. BENSON. MAGHI-NEIOB. CUTTING-'SHEET METAL.

4 APPLICATION FILED IAN. 275:'1908.

Patented 001;. 2o, 1908.

3 SHEETS-SHEET 1.

A. BENSON'.

MACHINE POR GUTTING'SHEET METAL.

APPLICATION FILED JAL27. 1908.

Patented Oct. 20, 1908.

s SHEETS-mm1' 2.

A. BENSON. MACHINE FOR CUTTING SHEET METAL.

APPLICATION FILED JAN. 27, 1908. V

` Patented Oct. 20, 1908.

3 SHEETS-SHEET 3.

Ill l UNITED STITATES-` YP2541" El*lfl ANDREW BENSON, oroiiiciod'iniiiuoisg.AssieNon .TO-itnwi E; ofififiifrisgorengiolieo,il

. j ILLINOIS. .-.f-

'M'Aciatmm Fon .CUTTING s iniiriinim'en;

To all whom ooocei'u;

Be itknownthet I, fAisDiuiw'BEissoN-,e

citizen of the 'UnitedStates, residing 1n. Chicago, in the countyof Cook and Stateof i Illinois, have invented, i rnew and 'useful Im? provenient Iin Machines for' Cutting Sheet' Metal, of which the fovllvowingis 'especificaspacedftol'correspond "to the width of the.

I' "ted portions `being ,separatedl 'from euch i i' otherby uncut bondl portions whose widthcorrespondsto the lengthof`the bonds in the completed artioleg-and then'uniting4 the alternate slits of adjacent slitte'd ysectigms by cuttingfthrough 'alternate' bondportions.

The resent inyentioni's'a inachine'a-da ted tos itgslie'et metal,l tszobject being toen-1. able the manufacture 4of :expanded inetulA in zuzcordzince4 with the process rapidly and cheapl and its nature is fully disclosed in the su joined'description and the `accompzi-f nying drawing, lad'iu the letter 4 Figure 1 is ztside elevation .of the mit Ichine. Fig. 2"isga longitudinal .Verticalsec-l ption. Fig. 31s a. transverse vertical sectioii.`

i "Fig .4 is a lpartial plan of the vcutting `roll 6a is an edge View of the saine. Fig. 7 shows' the mechanism,` for controllingfthe admis 40 wlii h. forinsthe longslits and'Fig. 5 isle v 35' Figy shows efplan'ofthemetal vatterits like 'View of thejroll whichl ciits.- the bonds.

rejection to the irs't "peirof rolls fand Fig'.

sionof 'the sheetsto the eiittingrolls. Fig'. S is esectionon linex8'-8 of `lig. A2 of the guides for preventing lateral nio\ f 'einent ,by the sheet while it is vmoving through thermechine. w g .The machine embodies: two pairs 'o fslitting rollS,ftli.ose marked-25 sind '26.' cutting the lon'g slits, und thoseinerked 27 and 2S making the slits in the bond'portions of "the" sheets, the forinenoperating in advance of. theA latten."`V They-. .are supported onsuitable frame workl() and areactuated by a train Theishgaft.

of gears driven by thepulley 1 1. 12 of. said'pulleycarriesafpinion' 13 ing with :igeer Mon seid shaft y 15.

specification of Letters Patenti Application tiled January 27,1308.; Serel No.v l112,296.

l'ec'coinpenying l epplicetion ,f Serial r ,also 'carries pinion'l`16'whichlineshes with and' ectupitesa large gear lZ. on :shaft with-'gears QIend" on th'e vends 'ofi the' lower slitting rolls ,26 'and-28 endgeirl 20 not shown on thev endo'f theupper slitting ,on thefend of1tlie.0tl 1`er iipper slitting roll with the seid lower rolls.

The [sheets of metalto iiotched :tt-25, as s'h'own etFigfi, this con- 'fromedge .-to v edge with slits such :is-are rnged in groups in the saine transverse yzones orsections of the sheet, aud-the difleich 4oth'erloy uncutzones ror sections f3.1, forining thehonds inl the completed article. Adjacent'. to these rolls Q5 end .26, are strip pers and theyl are "adapted to enterthe roll;- r After hying the long' slits formed in it, the sheetmovesfroni'i'ol s 25 and 26 into the cated in broken .linesat lEig.; 6 ,'."tl1ei't to say' the slits through any one bond'forniedf :`hy-. one 'cutter 34 connect only v lteri-iete Vslits .30,on ee'chside (1f-that bond, 'and the next 'succeeding'LV cutter. acts on the following :bond

:Ina'sinuch'asg rollers 27- ind QSere-'not "adopted to' feed the sheets es" continuously which ere locet'ede's shown erid'tke h old of i Onfthe `opposite' ends Aof sheft l are gears-'.19 and '20, of which gear 19' meshes' 'r both said. rolls are actuated-in' 'unisonf be Steed tra fed' into the 'machine over table29, and first enterbetw'een thevrolls 25 end'2 6.. `These rolls are provided4 with cou'i itering cutters 25 shown-zit 30 Figuf'tny the slits being arsatelites oet. .f'ao, isos; 1

struction .causing the slitting/of the sheet ferent groups .of .slits .being separated from pers' 32, vviicting 'tostrip' the "slittedinetzil from thel cutters should it' tend to r cliiigithereto. There'are two series ,of these strip- '-85' l spzices-betweerr'fthe cutters, 4one series.be

tween the cutters of the upper n roll Aund the other series between the cutters otthe lower bite of rolls 27- and 28, which4 are fashioned ioo so as toconnecte.therethroughfthezalternte slits not-ijoinedlb'ythepreviouscutter.`

los

the'sheets shortly before or as soon as they leave rolls'27 and 28 and control them for Y* the balance of the time theyvare in the machine.` The lower one of these rolls is actuated by'a' chain 37 passingover a sprocket 38 on roll 28. By the aid'of'these rolls I- insure the proper movement `of the sheets after they have been released by rolls 25 and 26, so'thatthebonds at the tail end of the sheets will be vproperly operated -uponby rolls 27 and 28.

It is desirable,of course, that the rolls 25 and 26 should commence loperating upon the sheets -at a predetermined point thereon, andhence I- provide means for arresting the sheet as it enters, the arresting means being adapted to release the sheet at the proper time. `These means consist of the fingers or stops 40, having their ends Abent downward so as to engage the advance edge ofthe-sheet, .and

a rock shaftl upon Awhich the fingers are mounted. Rock shaft ll-hasan arm 42l rid- -ing on a cam ring 43 upon vthe roll 2G and provided with projections 44fat intervals adapted to lift the arm t2 as 4the ring` re-1 volves. The projections are Vtimed to ,cause the fingers to\release the sheets at thev proper times. y

It is of course necessaryfthat' the;l heets being operated upon should not devia flaterally from a straight path after theyenter the machine, because of the narrow'ness 'of .the spaces between the cuts made bythe first l as'seen at Fig. 6, so that the guidesare enabled to resistV any 'tendency by the sheet rolls and the danger that the cuts eected by the-second pair of rolls would not vbe properly llocated with reference` to those made by the first pair if any deviation should oc-4 cur. To guide the sheet and prevent anyvv such deviation, I place just in advanceof the' second pairof rolls a series of guides 45, the'l upper edges of which are thin and are ar#V ranged in line with the strands cut by the first rolls, ,and slightly above the bottom plane of. the sheet, so that they will enter between such of the strandsin the sheet 'as may have been sprung down below the plane of the sheet by the cutters of the first rolls to move laterally. By means of these guides I insure the making of the cuts by the sec-A ond vpair of rolls in proper relation to. those made by the first pair of rolls. The guides are fitted upon a dovetail cross bar 4:5,wl1'ich is suitably secured in place.

It will =be noted that the second pair of rolls are adapted to cut inalinement with,

the first pair of rolls, but the ycutters 'of the second pair are 'divided into two "groups,

each acting in slitting a different-bondl fromV ,the bond slitted by the other group. In

other words, the" first groupwill'slit one bond connecting alternater pairs',A of' slits the. slitted sections adjoining thatbond, and' the from thespirit'o h ette y tion loffslittin'grol s for; forming long falined slits-'in transversesections of-the'@sheets,'se'pa'l A rated by transvers'euncut bondjsectionsgand'f. 'slittingrolls for severing 'thebondsectionsso as to connectkalternate pairs*goffslitsinjthe.. fIv thefbod j fslitsther'ein., i

:means bond 'section' in a snnilar. `manner, jconnecting only'Vl alterna te pairs-.ofl slits :of the' sli'tted sections adjacent to said-secondfbondsectio group will act. upon the` secondv the same, nor.' to the'-v 'uses-(of4 47ro'ta`.ryf slitting devices,asjobv io`usl .o Ver"orx'r'is'of slitting devices canjbe user y the inven-tionjbe; 'changed-,withoutde arti'ng the :an other .features lof slitting sheet, Ihetallf,

preparatoryfto .ex a'nding it, the Combinavslitted. sectionsl at oppositejsides o sections. .917? u 2. In a machine for j preparatory :to expandingy it,* `the' combina-4 tion of slitting rollsjorfoiming alinedflon-'Qv gitudinal slitsof uniformfleingthz inV adj acent transverse sections `ofthe sheet, such sections being separated byuncut'bond sections-,fand

:sheet other slitting rolls for'severingitlie bondsee tions in such manneras' to connectlnly-alternate pairs-of slits-"inl'fithe slitt throughA anyone bond." f Thecombinatio' alined slitsin.transversefsectinslofthe sheets vand bother rolls'v arrangedjffinfy the vrear ofv the first lmentionedv onesfand'' actin 1 to slit the bonds between i the slittedisections in` such- 'l l manner as fto connect the-'alternate 'pairs of 4v. The combination of rolls-'for I forming' i alin'edv ,slitsl .in transverse sections of- 'the' sheets, otherrolls arranged in ythe rear of@i the first mentioned onesand actingto slit the bonds between 'the slitt'ed sectionslso as to connect alternate pairs of the slits made by lthe first rolls,^e'sserrtiallyas described, and

r'fe'eding the sheet aftenit passes from the first mentioned rolls.

5. -The vcombination of' rolls forj'f'forming .'alined slits. in transverse sections of the alined slits in transverse' vsections of' the' sh`ets,'otherrolls arranged' in the rear of the lfirst mentioned ones and 'acting to slit thel bondsfbetween vthe slitted sections-in such manner a'sftoconnect alternate pairs of' slits madegbythe'rstrolls and guides for, pre` a venting lateral movement by the sheets, suoli guides engaging the slittedportions of the sheet. 4

7. In a machine for slitting metal sheets preparatory to expanding them,4 the combination with means for'forming long alined slits in transverse` sections of the sheets, of means for severing the bonds vbetween such sections .so asto connect alternate pairs of .slits through alternate bonds. l I

8.- ln armachine for. slitting metal sheets preparatory to expanding them, the co1nbi- 'nation with means for forming long alined slits in transverse sectionsr o fthesheets, of means for severing the bonds between th'e sections so as to connect alternate pairs .of

lslits through alternate bonds, and guides for l'preventing lateral movement -by the sheets engaging the slitted portions thereof. 9. In a niachinei;f r-slitting sheet metal preparatory to expanding it, the combination with means for forming alined slits in 4separated transverse sections of the sheets, ofy

separated transverse sections of the sheets, of

means for severing the separating parts of thel sheet in such manner that one half of said slits will beconnected through one of said separating portions, andthe other half of said slits be connected .through the vnext separating portion, said m'eans'tor severing the separating portions of the sheet con'slsting ofecutters mounted upon vthe same shaft.

ANDREW BENSON.

Witnesses :l

H. M. MUNDAY, p PEARL ABRAMS. 

